<template>
    <div ref="rightPanel" :class="{show:show}" class="rightPanel-container">
        <div class="rightPanel-background" />
        <div class="rightPanel">
            <div class="handle-button" :style="{'top':buttonTop+'px','background-color':theme}" @click="show=!show">
                <i :class="show?'el-icon-close':'el-icon-setting'" />
            </div>
            <div class="rightPanel-items">
                <slot />
            </div>
        </div>
    </div>
</template>

<script>
import { addClass, removeClass } from "@/utils";

export default {
    name: "RightPanel",
    props: {
        clickNotClose: {
            default: false,
            type: Boolean
        },
        buttonTop: {
            default: 250,
            type: Number
        }
    },
    data() {
        return {
            show: false
        };
    },
    computed: {
        theme() {
            return this.$store.state.settings.theme;
        }
    },
    watch: {
        show(value) {
            if (value && !this.clickNotClose) {
                this.addEventClick();
            }
            if (value) {
                addClass(document.body, "showRightPanel");
            } else {
                removeClass(document.body, "showRightPanel");
            }
        }
    },
    mounted() {
        this.insertToBody();
    },
    beforeDestroy() {
        const elx = this.$refs.rightPanel;
        elx.remove();
    },
    methods: {
        addEventClick() {
            window.addEventListener("click", this.closeSidebar);
        },
        closeSidebar(evt) {
            const parent = evt.target.closest(".rightPanel");
            if (!parent) {
                this.show = false;
                window.removeEventListener("click", this.closeSidebar);
            }
        },
        insertToBody() {
            const elx = this.$refs.rightPanel;
            const body = document.querySelector("body");
            body.insertBefore(elx, body.firstChild);
        }
    }
};
</script>

<style>
.showRightPanel {
  overflow: hidden;
  position: relative;
  width: calc(100% - 15px);
}
</style>

<style lang="scss" scoped>
.rightPanel-background {
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity .3s cubic-bezier(.7, .3, .1, 1);
  background: rgba(0, 0, 0, .2);
  z-index: -1;
}

.rightPanel {
  width: 100%;
  max-width: 260px;
  height: 100vh;
  position: fixed;
  top: 0;
  right: 0;
  box-shadow: 0px 0px 15px 0px rgba(0, 0, 0, .05);
  transition: all .25s cubic-bezier(.7, .3, .1, 1);
  transform: translate(100%);
  background: #fff;
  z-index: 40000;
}

.show {
  transition: all .3s cubic-bezier(.7, .3, .1, 1);

  .rightPanel-background {
    z-index: 20000;
    opacity: 1;
    width: 100%;
    height: 100%;
  }

  .rightPanel {
    transform: translate(0);
  }
}

.handle-button {
  width: 48px;
  height: 48px;
  position: absolute;
  left: -48px;
  text-align: center;
  font-size: 24px;
  border-radius: 6px 0 0 6px !important;
  z-index: 0;
  pointer-events: auto;
  cursor: pointer;
  color: #fff;
  line-height: 48px;
  i {
    font-size: 24px;
    line-height: 48px;
  }
}
</style>
